Sea Buckthorn
Also sold as: Omega-7
Best-in-class: Sea Buckthorn Oil
A berry oil uniquely rich in omega-7 (palmitoleic acid) for skin, mucous membranes and dry-eye/dryness support.
Sea Buckthorn quick facts
| Suggested dose | As directed (oil or capsules). |
| How often | Daily |
| Who it's for | Skin, dry-eye and mucous-membrane/dryness support. |
A randomized trial showed improved vaginal mucosal integrity in postmenopausal women, which is a specific and genuinely useful result for a symptom people rarely raise and that is under-served. Also evidence for dry eye and atopic dermatitis. Seed and berry oils have different fatty acid profiles; berry oil is the omega-7 source.
How Sea Buckthorn actually works
Uniquely rich in omega-7 palmitoleic acid, which is incorporated into mucosal and skin membrane phospholipids. It also supplies omega-3, omega-6, omega-9, tocopherols and carotenoids in one oil. The omega-7 content is what distinguishes it — very few dietary sources contain meaningful amounts.
Where to get Sea Buckthorn
Find Sea Buckthorn on iHerb →The evidence for Sea Buckthorn
Graded by what exists behind each claim.
✅ Clinically validated
- RCTs support improved skin hydration/elasticity and relief of dry eye and vaginal dryness.
- Omega-7 supports mucous-membrane and skin barrier health.
📊 Correlative data
- Long use across Tibet, Mongolia and Russia for skin and digestive complaints, and cultivated at scale in northern China. Unusual fatty acid profile including omega-7, which is what modern interest is built on.
🧪 Theoretical / extrapolated benefits
- Metabolic (omega-7) benefits are emerging.
How to read these tiers: they say how much human evidence exists, not how well something works — and ✗ flags harm, never a disappointing trial. How the evidence tiers work →
What Sea Buckthorn actually does
One berry yields two chemically different oils and the industry sells them under one name. Press the seeds and you get an oil that is roughly a third linoleic acid and a third alpha-linolenic acid. Press the soft pulp and you get something almost unique in the plant kingdom: an oil where palmitoleic acid — omega-7, 16:1n-7 — can approach a third of the total fatty acids. Which oil is in your capsule decides which of the mechanisms below is even available.
Palmitoleic acid has a named enzyme and a real physiological role. You make it yourself: stearoyl-CoA desaturase 1 introduces a double bond into palmitate. It is a monounsaturate that goes into membrane phospholipids and into secreted lipids, and it has been studied as a signaling fatty acid released from adipose tissue rather than merely a structural one. Dietary omega-7 is not correcting a deficiency — nobody is deficient in a fatty acid they can synthesize — it is adding to a pool.
The tear film is where the mechanism becomes specific, and it is a three-layer structure. A mucin layer sits on the cornea, an aqueous layer above it, and on top a thin lipid layer secreted by the meibomian glands in the eyelid margins. That lipid layer's only job is to retard evaporation. When it fails, water leaves faster than it is replaced, the remaining tears concentrate, and osmolarity rises. Hyperosmolar tears are not merely uncomfortable: they activate stress kinase and NF-kappaB signaling in the ocular surface epithelium, which is the inflammatory half of dry eye disease.
So the falsifiable claim is that eating a specific fatty acid changes a secreted lipid. Meibomian secretion is made from circulating and locally synthesized lipid, so a sustained change in the fatty acid supply should show up in it. That is not a hand-wave: tear film fatty acid composition was measured in the trial population and it changed Jarvinen 2011. Whatever else is arguable here, the premise that dietary fatty acids reach the eye's lipid layer has been checked.
The rest of the berry is not the fatty acids. Sea buckthorn carries flavonol glycosides of isorhamnetin and quercetin, an unusual tocopherol-plus-tocotrienol profile, phytosterols, and a carotenoid load high enough to color the oil deep orange. Those are real constituents with real ceilings, and they are the reason the safety section of this page is about totals rather than about the oil.
Cell, rodent, human — and where it stops
Dry eye, in people, with the number that matters. One hundred participants, 86 completing, took 2 g of sea buckthorn oil daily for three months. Tear film osmolarity was attenuated against placebo (P = 0.04 and P = 0.02 on the reported comparisons) and redness improved (P = 0.04) Larmo 2010. Osmolarity is the instrumented diagnostic in dry eye disease rather than a symptom score, which makes this one of the cleaner supplement results in the whole category.
And the mechanistic follow-up in the same population. Tear film fatty acids were measured and shifted with oral dosing Jarvinen 2011 — the intermediate step that most supplement trials assume and never demonstrate.
The mucous-membrane claim, extended and tested. One hundred and sixteen postmenopausal women, 98 completing, took 3 g a day for three months; improvement in the vaginal epithelium had an odds ratio of 3.1 (95% CI 1.11 to 8.95), while the vaginal health index showed only a tendency (P = 0.08) Larmo 2014. A real effect on the tissue with a soft effect on the composite score is exactly the shape of an honest, modest result.
The trial that separates the two oils, and it is the most important study on this page. Forty-nine people with atopic dermatitis took 5 g a day — ten capsules — of seed oil, pulp oil or paraffin oil for four months in a placebo-controlled double-blind design. The pulp oil group improved (P < 0.01). The seed oil group did not (P = 0.11) Yang 1999. One study, both oils, opposite results, and the market predominantly sells the one that failed.
The obstacle is arithmetic on capsule count. The trials used 2 g Larmo 2010, 3 g Larmo 2014 and 5 g Yang 1999 a day. Sea buckthorn oil is usually sold in 500 mg softgels with a suggested use of one or two. One capsule is a fifth of the smallest studied dose and a tenth of the largest. “As directed” on this product means a dose no trial has ever tested, and anyone concluding it did nothing at 500 mg has tested their patience rather than the oil.
The second obstacle is who was studied. Dry eye patients, postmenopausal women with vaginal atrophy, and people with atopic dermatitis — three populations with a deficit to correct. There is no trial in a healthy adult taking it for general skin quality, which is how most of it is sold.
Sea Buckthorn — which form, and does it matter
Seed oil and pulp oil are different products and the label usually will not say which. Seed oil is linoleic and alpha-linolenic acid; pulp oil is where the omega-7 lives. The one head-to-head human comparison found the pulp oil worked on atopic dermatitis and the seed oil did not Yang 1999. If a bottle says only “sea buckthorn oil”, you are being sold the cheaper press by default.
The number to look for is a stated omega-7 percentage. Pulp oil is typically 25 to 40% palmitoleic acid; seed oil is a few percent. A product that prints its palmitoleic content has told you which fraction is in the softgel, and a product that prints only milligrams of oil has not.
Supercritical CO2 extraction is worth paying for. The berry's value is in oxidizable material — polyunsaturates, carotenoids, tocopherols. Cold CO2 extraction avoids the heat and solvent residues of the alternatives and preserves the carotenoid load that makes the oil deep orange. Pale sea buckthorn oil has lost something on the way.
Dose to the trial, not to the label. 2 g a day is four 500 mg softgels Larmo 2010; the dermatitis study used ten Yang 1999. That is the real cost of running this experiment properly, and it is worth knowing before starting rather than after three unremarkable months on one capsule.
Oral and topical are separate products with separate evidence. Sea buckthorn oil is also sold as a face oil, and the trials on this page are all oral Larmo 2010 Larmo 2014 Yang 1999. Applying it to your face is not a smaller version of the same experiment; it is a different one nobody has run at this quality.
What would have to be true, and how you would know it was not
1. Count drops, because it is the cleanest number you own. What to watch: artificial tear drops used per day, written down. It is countable, it needs no mirror, and it is the closest consumer proxy for the osmolarity endpoint the trial moved Larmo 2010. How long before it means anything: eight to twelve weeks at 2 g a day, because fatty acids have to be incorporated into secreted lipid before anything downstream shifts Jarvinen 2011. What will fool you: screen time, air conditioning, pollen and central heating, all of which move with the seasons — so a summer start and an autumn verdict compares two environments rather than two conditions.
2. The prediction that cuts against the product, and it is diagnostic. Predict no benefit in a dry eye that is aqueous-deficient rather than evaporative — the Sjogren-type picture, where the lacrimal gland is the problem. The mechanism here is a lipid-layer, evaporation mechanism, so if your optometrist has measured a low Schirmer with a normal tear break-up pattern, this oil is aimed at the wrong layer and the honest prediction is nothing.
3. Predict that the seed oil under-performs the pulp oil, and you can test it. One human study found exactly that on a skin endpoint Yang 1999. Run twelve weeks of a stated pulp or whole-berry oil after twelve weeks of an unspecified one at the same grams per day. This is the single most useful within-person experiment on this page, and no manufacturer will suggest it.
4. Predict the lipid-panel does not move. Two to three grams of any oil is about 20 to 30 calories, and the omega-7 metabolic literature is preclinical. If total cholesterol or triglycerides shift over twelve weeks, the explanation is the rest of the diet.
5. Watch vitamin-a if you are stacking. The oil is heavily carotenoid-loaded, and carotenoids are a provitamin A source. On their own that is self-limiting; alongside a multivitamin with preformed retinol and a cod liver oil it is a total worth adding up rather than assuming.
What nobody has tested yet
Nobody has repeated the oil-versus-oil comparison. The seed against pulp result is one study of 49 people in one indication Yang 1999, and it is the finding with the largest commercial consequence in this whole product. Repeating it in dry eye — seed oil, pulp oil, placebo, osmolarity as the endpoint — would either justify or dismantle the omega-7 marketing in one trial.
Nobody has isolated the fatty acid. Purified palmitoleic acid exists. A trial of pure omega-7 against whole pulp oil at matched palmitoleate would say whether the berry's flavonoids, tocopherols and carotenoids contribute anything, or whether the oil is a delivery vehicle for one molecule.
Nobody has measured meibomian secretion directly. Tear film fatty acids were measured Jarvinen 2011, which is one step short of the gland itself. Meibography and expressed meibum analysis are routine in an ophthalmology clinic, and a supplement trial has never used them.
And nobody has tested it in a healthy adult. Every trial recruited a deficit — dry eye Larmo 2010, vaginal atrophy Larmo 2014, atopic dermatitis Yang 1999. The general “skin and dryness” claim that sells the product has never been tested in anybody who did not already have a diagnosis.
Sea Buckthorn — its own safety story, not its category's
The bleeding question is real and it is mechanistic rather than documented. An oil this rich in unsaturated fatty acids is incorporated into platelet membrane phospholipids, and platelet eicosanoid output depends on which fatty acids are in that membrane. That is a coherent route to reduced aggregation and it has not been quantified in a trial at the doses used here. The practical consequence is unambiguous: on warfarin, apixaban, rivaroxaban, clopidogrel or daily aspirin, treat 2 to 5 g a day of this oil as a meaningful addition, watch for bruising and nosebleeds rather than waiting for a blood test to tell you, and stop it two weeks before surgery or a dental extraction.
The ceilings in this bottle are vitamin E and carotenoids, not the fatty acid. Sea buckthorn oil is unusually rich in tocopherols and tocotrienols and deeply pigmented with carotenoids. At one capsule that is trivial; at the trial doses of 2 to 5 g a day Larmo 2010 Yang 1999 it is a real contribution, and it stacks with a multivitamin, a separate vitamin E capsule and an astaxanthin product. High-dose vitamin E has its own bleeding association, which compounds the paragraph above.
Blood pressure is the second additive axis. Mild blood-pressure lowering is reported for this berry, so on an antihypertensive the effect is additive rather than parallel. That is an argument for a home blood-pressure average across the first month rather than for avoiding it.
Gastrointestinal upset is dose-related and predictable. The trial doses are four to ten softgels a day Larmo 2010 Yang 1999. Loose stools and reflux at that intake are the oil, not the berry, and splitting the dose across meals fixes most of it.
Pregnancy and breastfeeding are absence of data, not reassurance. Every trial here excluded them Larmo 2010 Larmo 2014 Yang 1999, which is the reason nobody can answer the question rather than a finding about the berry.
And the failure mode: dry eye that is a disease. Persistent grittiness with light sensitivity, blurred vision that clears on blinking, or dryness alongside a dry mouth and joint pain is a reason for an ophthalmology or rheumatology opinion. A supplement that reduces drop use is exactly the thing that makes an unexamined autoimmune dry eye feel managed.
Sources read for this page
- Larmo PS, et al. Oral sea buckthorn oil attenuates tear film osmolarity and symptoms in individuals with dry eye. The Journal of Nutrition, 2010 · PMID 20554904
- Jarvinen RL, et al. Effects of oral sea buckthorn oil on tear film Fatty acids in individuals with dry eye. Cornea, 2011 · PMID 21832964
- Yang B, et al. Effects of dietary supplementation with sea buckthorn (Hippophae rhamnoides) seed and pulp oils on atopic dermatitis. The Journal of Nutritional Biochemistry, 1999 · PMID 15539258
- Larmo PS, et al. Effects of sea buckthorn oil intake on vaginal atrophy in postmenopausal women: a randomized, double-blind, placebo-controlled study. Maturitas, 2014 · PMID 25104582
How you would know if it worked
There is no blood test for this one. That is not a criticism — it is a fact about the effect, and it changes how you should judge it.
- What to watch: Dryness where you can score it daily — eyes and mucous membranes rather than the face. Artificial tear drops used per day is the cleanest number available anywhere in this category: countable, yours, and it needs no mirror.
- How long before it means anything: Eight to twelve weeks. Omega-7 has to be incorporated into membrane lipids before anything downstream shifts, and the dry-eye trials ran over that kind of span rather than over days.
- What will fool you: Screen time, air conditioning and pollen. Dry eye swings hard with all three and all three move with the seasons, so a summer start and an autumn verdict compares two environments. Blink rate also improves the moment somebody starts paying attention to their eyes.
Run it one variable at a time. Starting three things in one week means a result you cannot attribute, which is the same as no result.
Sea Buckthorn — safety & side effects
- Well tolerated; GI upset at higher doses.
- Mild antiplatelet activity and blood-pressure lowering.
- Generally benign. Not established as safe in pregnancy or breastfeeding — not because harm is documented, but because these are the two populations systematically excluded from the trials. Absence of data is not reassurance. Very high in vitamin E and carotenoids, which counts toward your totals.
Not medical advice. If you take prescription medication or have a diagnosed condition, check this against it with a pharmacist or doctor — pharmacists are underused and free.
- When to take it, and what to take it with
- Which form actually absorbs
- Who it's worth it for
- Best-in-class brand pick
- Coach Cam's stacks and notes
- Fasted or with food, and when in the day
- Morning or night, and why that window
- Around training, or deliberately away from it
- What it must not share a window with
Everything above is free and stays free. Skool is where it becomes a plan — Sea Buckthorn in an order, with the rest of what you're running.
Unlock in Skool — $10/mo →Bloodwork to run alongside Sea Buckthorn
Baseline first, then again at 8–12 weeks.
| Marker | What it’s watching for |
|---|---|
| Ferritin | Below 50 and hair and skin repair suffer, whatever else you take |
| Vitamin D (25-Hydroxy) | Skin, bone and connective tissue all depend on it |
| TSH (Thyroid-Stimulating Hormone) | Thyroid disease shows in hair, skin and nails first |
| Zinc, Plasma | Deficiency causes poor wound healing and hair shedding |
The Basics — Start Here panel covers these in one order — 4 markers, $32.40 with the discount applied.
Check results you already have → · All 103 markers A–Z
Sea Buckthorn — frequently asked questions
What is Sea Buckthorn?
A berry oil uniquely rich in omega-7 (palmitoleic acid) for skin, mucous membranes and dry-eye/dryness support.
What is the suggested dose of Sea Buckthorn?
As directed (oil or capsules). This is a general reference for education only — statements have not been evaluated by the FDA and this is not medical advice.
Where can I find Sea Buckthorn dosing and the full breakdown?
The suggested dose and the full evidence — clinical, correlative and theoretical — are on this page. What's inside Skool is when to take it, which form actually absorbs, the brand worth buying and Coach Cam's stacks.
Where can I buy Sea Buckthorn?
Coach Cam sources Sea Buckthorn from vetted, top-rated brands on iHerb — use the buy link on this page.
What Sea Buckthorn is used for
Sea Buckthorn appears under 3 goals in the goal router.
Related Skin & Structural supplements
Where this goes next
The pages here are the frameworks. The protocols — the dosing, the order to correct things in, the week-by-week schedule and what to retest — are inside Skool.